Shuttle for sewing-machines



(No Model.)

2. T P-BENCH & w. '0. MEYER. SHUTTLE FOR $EWING MACHINES.

No. 424,966. Patented Apr. 8, 1890.

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UNITED STAT S iPATENT OFFICE.

ZAOHARY TAYLOR FRENCH AND VVIELIAMORISTIAN MEYER, OF BOSTON, MASSACHUSETTS.

SHUTTLE FOR SEWING-MACHINES.

SIPEGIFICATION forming part of Letters? Patent No. 424,966, dated April 8, 1890.

Application filed December 9, 1889. Serial No. 333,106, (No model.)

[ This invention has for its object to improve that class of sewing-machines having a substantially circular shuttle and working in a circular race.

We have shown our invention as adapted I for use in a machine substantially such as described in United States Letters Patent No. 412,703, granted to us October 8, 1889. I11 the machine described in the said patent the axis of motion of the bobbin is concentric with relation to the axis of motion of the shuttle and the shuttle-thread is pulled from the bobbin only by the action of the take-up, and the thread delivered from a point in line with the center of movement of the shuttleis 2 5 alternately slightly twisted and untwisted.

In this our present invention the axis of motion of the bobbin is eccentric to the axis of motion of the shuttle, and the shuttlethread, led from the bobbin to a tension de- 0 vice, is delivered from a leader having its pivot concentric to the axis of .motion of the bobbin carrying the shuttle-thread, the said leader being, however, restrained from circular movement by a stationary holder adapted 3 5 to receive a lug at the outer side of the said leader, the said lug sliding vertically, or nearly so, in the slot of the holder and in a path crossing or intersecting the bobbin as the shuttle is operated in the formation of a stitch. The

40 hub of the leader forms a bearing for the bobbin.

Figure 1 is a front elevation of a shuttle, its race, and the thread leader and holder, the shuttle being in the position it will occupy 5 just as the shuttle-point b is to enter the loop of thread carried or formed by the usual cooperating needle. (Not shown.) Fig. 2 is a scctionin the line to, Fig. 1; Fig. 3, an edge View of the bobbin and tension device and thread-leader, and Fig. 4 a top or plan view of the holder detached.

The circular shuttle-race A, its cap B, the

circular shuttle 0, having its heel at a and its point at b, the shuttle-driver D, having a pro- ,jection d to contact with the heel of the shuttle and a pin cl to engage the shuttle at the base of the point 12, and the shaft E, to which the driver is secured, and the gear F on the said shaft, and herein shown only in section ,in Fig. 2, are and may be all substantially as in our said patent.

The shaft E may be actuated or oscillated by devices such as described in the said patent, in which event the shuttle will be oscillated or reciprocated in a circular path in the said race; but we desire it to be understood that the shaft E may, if desired, be rotated in any usual manner, in which event the shuttle would be rotated in the said race. The body of the shuttle isprovided with abobbinreceiving chamber, in which'and eccentric to the axis of motion of the shuttle in the race,

is erected a stud e, which is eccentric to the center of the shaft E. The sleeve-like hub f of the thread-leader f is mounted loosely 011 the stud e. The leader .is shown as a radial arm having a lug f and an eye near its end, out through which is delivered the thread taken from the bobbin g, having its bearing on the hub of the leader, as best shown in Fig. 2.

The leader, as herein shown, has connected to or made part of it a tension device consisting of a forked or bifurcated bar, over and under parts of which the bobbin-thread is 8 5 drawn between the bobbin and delivery-eye of the leader.

The shuttle race has a stand h, provided with a hole to receive a screw-stud h on an arm m of the holder, the said holder having a slotted yoke m. The lug f enters the slot in the yoke m of the holder, and as the shuttle is moved the said lug slides in the said slot, this being necessary owing to the eccentric location of the bobbin, and as the said 5 lug rises in the said slot, the shuttle at such time, as herein provided for, moving backward or in the direction of the arrow 20 thereon in Fig. 1 preparatory to again placing its point I) in position to be again moved forward in the direction of arrow 24 to enter the usual loop of needle-thread, the said leader acting on the shuttle-thread between the bobbin on the stud e, which is then moving eccentrically, and the work, the thread being then pulled off suflicient-ly to prevent the cutting of the shuttle-thread by being drawn across the needle-thread when setting the stitch. Inclining the slot in the arm m more or less from a vertical line, as by carrying the lower end of the arm to the right, as shown in Fig. 1, results in pulling off an increased amount of shuttle-thread, as desired. The stud h, extended through the stand h, receives upon it a thumbnut 7L2, by which to secure the holder in place, a projection its on the arm m entering a notch in the stand h.

It will be observed that the delivery end of the leader in its movements, as described, moves in a path to cross or intersect the plane in which the bobbin and shuttle move.

e do not desire to limit our invention to the exact shape shown for the tension device, as the number and shape of the bars may be variously modified without departing from our invention.

The bobbin being mounted upon the sleeve of the leader, which does not rotate, prevents any rotation of the bobbin, except that due to the pull of the thread thereon and the ccthread-leader and a holder, the said leader and holder being loosely connected, as described, to permit the shuttle to be moved in the circular race and cause the leader to move in a line across or to intersect the plane in which the bobbin travels, substantially as described.

2. The shuttle race, the circular shuttle thereon having a bobbin-receiving chamber, and a stud e, eccentric to the axis of motion of the shuttle, and abobbin, combined witha thread-leader having an attached tension device and a holder, the said leader and holder being loosely connected, as described, to permit the shuttle to be moved in the circular race and cause the leader to move in a line across or to intersect the plane in which the bobbin travels, substantially as described.

The shuttle having the eccentrically-located stud e and the leader having a sleevelike hub mounted thereon, the bobbin mounted on the said sleeve loosely, and means to restrain the delivery end of the leader as the shuttle is moved in a circular path, substantially as described.

In testimony whereof We have signed our names to this specification in the presence of two subscribing witnesses.

ZAGHARY TAYLOR FRENCH. W'ILLIAM CRISTIAN MEYER.

\Vitnesscs:

GEO. W. GREGORY, FREDERICK L. EMERY. 

